CompatHelper: bump compat for Clang to 0.18, (keep existing compat) (#62)

Co-authored-by: CompatHelper Julia <compathelper_noreply@julialang.org>

Author: github-actions[bot]

Project.toml

@@ -18,7 +18,7 @@ UUIDs = "cf7118a7-6976-5b1a-9a39-7adc72f591a4"
 libcxxwrap_julia_jll = "3eaa8342-bff7-56a5-9981-c04077f7cee7"
 
 [compat]
-Clang = "0.14, 0.17.4"
+Clang = "0.14, 0.17.4, 0.18"
 CxxWrap = "0.14"
 GPUCompiler = "0.23, 0.24, 0.25, 0.26"
 JSON = "0.21.4"